<!-- 现代简约风格404 -->
<div class="fullscreen-404 modern-simple">
    <div class="error-code">404</div>
    <div class="error-title">页面未找到</div>
    <div class="error-message">抱歉，您请求的页面不存在或已被移除。请检查您输入的网址是否正确，或返回首页重新浏览。</div>
    <div class="error-actions">
        <button class="error-btn btn-primary">返回首页</button>
        <button class="error-btn btn-outline-secondary">联系我们</button>
    </div>
</div>
